Logic 9 Can't find 3rd party plugins

I downloaded some free 3rd party plugins and installed them in logic. I have them installed correctly and I can use them on any channel. The problem is I don't see components in the plugin list anymore. I had about 13 components installed in the plugins list. I used to see them at some time but now when i go to plugin folder it's completely blank. What's going? As I stated earlier I can still use them with no problem on all channel strips...click an insert, scroll down to AU units, see all the free plugins, select one, and bam it's there. Working as it should. I can't find the components for each plugin in my plugin folder anymore.